well @Thunderer and i was thinkin about its stats so here it is;
Suggested Stats for Ionblast Cannon
Hull Damage Per Shot: 52000
Shield Damage Per Shot: 426000
Range: 4400m
Projectile Speed: 800 m/s
Refire Rate: 0.10
Energy Usage: 2500000
So it does 52k damage to hull, yes. Because it should insta kill a snub if it hits, it will melt down small crafts.
Actually Snubs that have more than 22.000 HP will survive from Ionblast
Battleships actually have 425.000 Shield and 426.000 Shield damage is enough to deshield any battleship with one shot
It has same range,speed and energy usage with Heavy Mortar
Overall Capital Weapons Anti-Shield Efficiency and Ionblast